The fire started around 6 a.m. Wednesday on the 100 block of East Willard Street.
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Firefighters arrived to heavy flames showing on the first and second floors of a middle row house.
One of the houses collapsed. It's not clear if it was the house where the fire started.
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Officials believe that house was vacant.
Fire crews continue to put out hot spots.
L & I is expected on the scene, along with The Red Cross to assist any residents displaced.
So far, there are no reports of any injuries.